The development of the "snooperscope," an electronic device for seeing infrared radiation, made continuation of the experiment unnecessary Rubin and Walls, 1969.    From Wordnik.com.  [Mind Hacks: August 2005 Archives] Reference

The blue pencil is a secret infrared snooperscope. ".    From Wordnik.com.  [Tom Swift Jr And His Flying Lab]

"I'll use the snooperscope on him.".    From Wordnik.com.  [Tom Swift Jr And His Flying Lab]